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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'f5285ac445fc2c4e77365dedda7e886cef169dc435805a7e0625bd07778c7895' 
  AND token = 'D5Bjd7BkvGzWJWjDKSiY9GEcYKBZQ7tXvS4esykwRNM=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00027

JSON explain

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