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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '95baeb149cd51abc5a35260260b84dedd2248f9cbae08b1e9405873a48416689' 
  AND token = 'pvhVS1ivyanme9lzrET9rcaAe0gHCG/XL+nR/TGx5IM=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00046

JSON explain

{
  "query_block": {
    "select_id": 1,
    "message": "no matching row in const table"
  }
}