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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'bba6e253d67fb11fe3f39a996ac56d1e6c5d18d936c05456f1a698a001a3693e' 
  AND token = 'JXpOR+1YjVm2v4PJ7VXYgA9XrQU/plkl2jl1ClyQZCo=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00019

JSON explain

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